Research and Structural Optimization of Heat Dissipation Performance of Plate-Fin Heat Exchanger

Abstract

Aiming at the problem of high oil temperature in a certain engineering machinery transmission system, a method to improve the heat dissipation performance of the heat exchanger by improving the internal structure of the heat exchanger is proposed, which makes it work in the normal temperature range. Based on the Colburn analogy equation and the fluid force balance equation, the influence factors of the heat dissipation performance of the water passage in the heat exchanger are analyzed. It can be seen that the cross-sectional area of the fluid passing through the fins is the most important factor affecting the heat dissipation performance of the heat exchanger. Comparing the heat dissipation performance before and after the improvement of the heat exchanger structure, the result shows that the heat dissipation power of the heat exchanger is increased by 18.3% ,and the oil temperature of the engineering machinery power transmission system is reduced by 19%,which effectively solves the problem.